US 12,434,987 B1
Carboxymethyl cellulose hydrogel loaded with titanium oxide nanoparticles for wastewater treatment
Hany Mohamed Abd El-Lateef Ahmed, Al-Ahsa (SA); Mai Mostafa Khalaf Ali, Al-Ahsa (SA); Mohamed Gouda, Al-Ahsa (SA); Mohammed Abbas Alsaeed, Al-Ahsa (SA); and Fatima Essa Al Rasheed, Al-Ahsa (SA)
Assigned to KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed by KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed on Jan. 9, 2025, as Appl. No. 19/015,470.
Int. Cl. C08B 11/12 (2006.01); B01J 21/06 (2006.01); B01J 35/39 (2024.01); B01J 35/45 (2024.01); B01J 37/08 (2006.01); B01J 37/12 (2006.01); C02F 1/32 (2023.01); C02F 1/72 (2023.01)
CPC C02F 1/725 (2013.01) [B01J 21/063 (2013.01); B01J 35/39 (2024.01); B01J 35/45 (2024.01); B01J 37/08 (2013.01); B01J 37/12 (2013.01); C02F 1/32 (2013.01); C08B 11/12 (2013.01); C02F 2305/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of making a carboxymethyl cellulose (CMC) hydrogel loaded with TiO2 nanoparticles (NPs) comprising:
providing raw date fiber;
bleaching the raw date fiber to obtain bleached date fiber;
delignifying the bleached date fiber to obtain delignified date fiber;
alkalizing the delignified date fiber to obtain alkalized date fiber;
esterifying the alkalized date fiber to obtain date derived carboxymethyl cellulose;
dissolving the date derived carboxymethyl cellulose in calcium chloride to form a paste solution of CMC-CaCl2;
adding about 0.6 g of TiO2NPs to the paste solution to obtain a mixture;
stirring the mixture for about 4 hours to obtain a TiO2NPs-CMC-CaCl2 paste;
storing the TiO2NPs-CMC-CaCl2 paste for about 24 hours followed by washing and centrifuging to obtain washed TiO2NPs-CMC-CaCl2 paste;
refrigerating the washed TiO2NPs-CMC-CaCl2 paste for about 24 hours; and freeze drying for about 48 hours to obtain a TiO2NPs-CMC-CaCl2) hydrogel.